01970 2200229 4500001002100000010002100021090001500042100004000057101001300097200005000110205001200160210005200172215001100224225003900235330121400274606002001488606002401508606001401532686004801546700002901594995011701623FRBNF375180020000004 a0821804294brel. 95679a5679 a19970806d m y0frey5003 b aengceng1 aAlgebraic number fieldsbMONfGerald J.Janusz a2nd ed. cAmerican Mathematical Societyd1996aProvidence a276 p.1 aGraduate studies in mathematicsv7 aThe book is directed toward students with a minimal background who want to learn class field theory for number fields. The only prerequisite for reading it is some elementary Galois theory. The first three chapters lay out the necessary background in number fields, such the arithmetic of fields, Dedekind domains, and valuations. The next two chapters discuss class field theory for number fields. The concluding chapter serves as an illustration of the concepts introduced in previous chapters. In particular, some interesting calculations with quadratic fields show the use of the norm residue symbol. For the second edition the author added some new material, expanded many proofs, and corrected errors found in the first edition. The main objective, however, remains the same as it was for the first edition: to give an exposition of the introductory material and the main theorems about class fields of algebraic number fields that would require as little background preparation as possible. Janusz's book can be an excellent textbook for a year-long course in algebraic number theory; the first three chapters would be suitable for a one-semester course. It is also very suitable for independent study. aCorps de classe aCorps algébriques aAlgèbre a512.2 Arithmétique, courbes algébriques aJanuszbGerald J.912342 95795bENSBcENSBeMATHEMATIQUESj00005698k512.2 JANm2007-06-25o0u512.2 Arithmétique, courbes algébriques